17 Facts About Blue


Blue is one of the three primary colours in the RYB colour model, as well as in the RGB colour model.

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Blue chose seven colours because that was the number of notes in the musical scale, which he believed was related to the optical spectrum.

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Blue is the colour of light between violet and cyan on the visible spectrum.

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Blue Boy, featuring lapis lazuli, indigo, and cobalt colourants,.

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Blue pigments were once produced from minerals, especially lapis lazuli and its close relative ultramarine.

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Blue light is scattered more than other wavelengths by the gases in the atmosphere, hence our "blue planet".

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Blue eyes are most common in Ireland, the Baltic Sea area and Northern Europe, and are found in Eastern, Central, and Southern Europe.

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Blue eyes are found in parts of Western Asia, most notably in Afghanistan, Syria, Iraq, and Iran.

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Term for Blue was relatively rare in many forms of ancient art and decoration, and even in ancient literature.

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Blue was not used for dyeing fabric until long after red, ochre, pink, and purple.

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Blue glazes posed still another challenge since the early blue dyes and pigments were not thermally robust.

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Blue was not one of the four primary colours for Greek painting described by Pliny the Elder .

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Blue was widely used in the decoration of churches in the Byzantine Empire.

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Blue installed stained glass windows coloured with cobalt, which, combined with the light from the red glass, filled the church with a bluish violet light.

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Blue had come from obscurity to become the royal colour.

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Blue came into wider use beginning in the Renaissance, when artists began to paint the world with perspective, depth, shadows, and light from a single source.

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Blue continued to be the colour of the field uniform of the US Army until 1902, and is still the colour of the dress uniform.

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